S71911 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71911 CB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.18 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2239 lbf
Radial static load rating
1834 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 574.74
/ each
In Stock
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S71911 CB/HCP4A Bearing Product Overview & Core Advantages
The S71911 CB/HCP4A is a high-precision, sealed double row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Its design enables it to simultaneously support combined loads (radial and bidirectional axial loads) efficiently. Featuring a compact cross-section, ceramic balls, and a phenolic cage, it delivers superior high-speed performance, high rigidity, and extended service life. The bearing comes pre-lubricated and is manufactured to a P4 (ABEC-7) tolerance class, making it an ideal choice for high-performance spindles and precision machinery.
S71911 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a bearing with a 15° contact angle. |
| 7 | Indicates a double row angular contact ball bearing design. |
| 1911 | Specifies the bearing dimensions: 55mm bore, 80mm OD, 13mm width. |
| CB | Denotes a specific internal clearance and preload condition for optimized rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | Specifies a very high tolerance class (ABEC-7 / P4) for precision applications. |
S71911 CB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row design provides superior radial and axial rigidity, enabling stable operation under significant combined loads.
- Exceptional High-Speed Performance: The combination of lightweight phenolic resin cage and low-friction ceramic balls significantly reduces centrifugal forces and operating temperature, allowing for a high limiting speed of 28,000 rpm.
- Precision and Longevity: Manufactured to P4 tolerance, this bearing ensures minimal runout and vibration. The hybrid ceramic construction offers increased durability and resistance to wear.
- Maintenance-Free Operation: The integral seals protect against contamination, and the factory-applied lubrication is suitable for the specified temperature range of -30°C to 110°C, ensuring long-term, reliable performance.
S71911 CB/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Robotics and Automation
- Medical and Dental Equipment Spindles
